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5

PROGRAMMING & OPERATING INSTRUCTIONS

CO1903 - RSR Installation Instructions 

The CO1903 is designed to accept a “HOLMAN” Rain 
Sensor, model CRS1000BC, which has a factory fitted plug. 

Install your rain sensor where it can be exposed 
to the weather to detect any wet periods. Preferred 
mounting locations are rain gutters or attach onto 
conduit. Set the “cut off” level on the sensor, and
adjust to suit your particular area.

To install the timer to the rain sensor, simply remove 
the rubber plug fitted into the bottom of the tap timer, 
and insert the rain sensor plug fitted on the end 
of the rain sensor cable.

When the sensor is wet, it will stop the tap timer 
from operating any manual or automatic run times. 
Once the sensor is dry, the automatic programs will 
resume.

To override the sensor, 
remove the rain sensor 
plug from the tap timer 
by simply pulling it out.
 
This will allow manual 
or automatic starts 
when the sensor 
indicates that it’s WET.  

When un-installed, re-fit the rain sensor plug into the 
rubber socket that’s provided for added protection.  

1.

2.

3.

4.

 
P/N 

CRS1000BC

 
(Sold Separately)

 
EASY to install, simply plug in!

 
Rain 
Sensor 
Plug

Set
Rainfall
Quantity

STEP 1- SET CLOCK & DAY

STEP 2 - SET AUTOMATIC START(S)

                             

(This product has a military clock, 24hr clock)

PRESS

        button and the minutes will be flashing, adjust using    or    .

PRESS

        button and the hours will be flashing, adjust using     or    .

PRESS

        button to allow the setting of the current day of the week. 

Scroll through days by 

PRESSING

    until the current day is set. 

PRESS

       to return to clock.

To get out of the programming cycle, 

PRESS

        &       simultaneously.

The unit is capable of up to 9 individual starts per day. Each start can operate independently 
on the same day or on different days. Each start consists of a 

start time

, the 

days of the week

to operate and a run time. All fields need to have a setting for the unit to operate correctly.
To get out of the programming cycle 

PRESS

        &        simultaneously.

Set Start Time:

 (Note: Military Clock) 

To set an automatic start time:

PRESS

        & START No “1” will flash.

PRESS

        & the minutes will flash, adjust using     or     .

PRESS

        & the hour will flash, adjust using     or     buttons.

Set Watering Days:

PRESS

         & “MON” will flash. To delete day 

PRESS     

button & to re-activate, 

PRESS     

.

Continue through the 7 days by pressing        & either leave days active or delete as required.

Set Run Time:

PRESS

        & the run time in minutes will be flashing, adjust using the     or      .

Minimum run time is 1 minute and the maximum run time is 255 minutes.
NOTE: If the run time is set to “OFF”, this means there is 

NO

 run time recorded and will not 

water, even if a start time has been entered. 
When setting a program, you must complete the full programming loop.

PRESS

        to return to the clock which completes the programming loop. 

If a second automatic start time is required, 

PRESS

        and START No”1” will flash. Move to 

START No “2” position by pressing     button once.
Proceed by 

PRESSING

        to set the start time, watering days and run time, adjust the 

values with the     or      buttons.

To get out of the programming cycle, back to the clock, 

PRESS

        &        simultaneously.

STOP

To stop an automatic or manual watering cycle, 

PRESS        

&        simultaneously.

Manual ON

To run manually for a length of time up to 

255

 minutes, 

PRESS

     (manual on) and set the 

minutes required by 

PRESSING

 either     or      buttons.

Manual RUN a start

To run any automatic start time once, 

PRESS

     (manually run a start). The display will show 

START No “

1

” and will self activate in 5 seconds or 

PRESS

        button.

To activate any of the other starts, first 

PRESS

     to enter into the “run a start” mode then

followed by the     button until you reach your desired start number. The unit will activate that 
start time in 5 seconds or simply 

PRESS       

If the unit does not turn on, your chosen start has the run time set to “OFF”.

OFF / Winter Shut Down

The 

CO1905

 model requires each start to be individually programmed to “OFF”.

Commence by 

PRESSING

        & the start number will flash. 

PRESS

        & the minutes will 

flash. At this point 

PRESS

     &     simultaneously, the start time will disappear and “OFF” will 

be shown. This start time has now been suspended, not cancelled. To return to the clock 

PRESS

       &       simultaneously. If you have more than one start time, each start time will 

need to be individually set to “OFF”.
To re-activate an automatic start time. 

PRESS

        & the start number 1 will be shown. 

PRESS

    to the desired start number, 

PRESS

        & “OFF” will be displayed. Use either

or     to bring the start time active again & set as desired. The unit will remember any pre-sets.

The 

CO1906

 model comes with a rain sensor socket at the bottom of the timer to take a 

HOLMAN rain sensor with a plug fitted. This feature will automatically shut the tap timer off 
when the sensor is wet. If your not using a rain sensor, individual start times can be turned 
off 

manually

 during winter or after heavy rain. Refer to the above instructions to simply turn a 

start time OFF. If the system is to be OFF for an extended period it is recommended that the 
pressure be turned off at the tap and remove the batteries from the unit. It’s recommended
to removed the unit from the tap for storage. 
Remove Batteries: Batteries corrode over time, so for best results remove & start a new 
season with new batteries. Removing batteries deletes 

ALL

 programmed information.

Water Saver

To reduce the automatic run time (or times) by %, 

PRESS        

&        buttons simultaneously 

when the clock is showing. The display will show           (100%) and            (budget).
This represents the existing run time (or times) in the automatic program as being 100%.
To reduce the run time by percentage use     button. Example:       (50%) will halve the 
automatic run time or times.

PRESS        

&        simultaneously to return to the clock. 

This feature is often used when the seasons change to allow different watering settings.

Using the 4 control buttons, follow the steps 
below to program the tap timer.

Tips on using the buttons:

A. Only the value in the field that is “

flashing”

 can be adjusted using     or     .

B. One press of any button will move you into the next field.
C. Holding down the     or     button will speed up the programming process.
D. Programming can be done away from the tap by simply fitting the batteries.

Increase Value

Scroll

 using this button to 

set the time & day

Scroll

 using this button to 

program the timers 
automatic settings.

Decrease Value

Product Codes:

GLOSSARY

Battery Operated

Tap Timer

PROGRAMMABLE

Single Outlet

Simple 4 button programming:

 

Set clock, Set Starts, Manual Start.

Rain Sensor Ready 

models have a socket

to receive the RSR plug

Tap 
Connector

Locking Nut

Easy to read

LCD display

includes:

Individual

Day 

Watering

Start 

Number

Run Time

Current time

Installing or Replacing Batteries.

It is recommended to use good quality alkaline1.5 Volt 
AA batteries to get the best results. Simply unscrew 
the battery cover to access batteries. 
As shown, install 2 x 1.5 Volt AA
batteries in the correct orientation.
Screw cover back into place. The unit will 
                       close automatically when the
                           battery voltage is low.

HOLMAN INDUSTRIES guarantee to the original purchaser that any product supplied will be free from defects in materials & workmanship 
for a period of two years from the date of purchase. Any product found to have defects in material or workmanship within the period of this 
guarantee shall be repaired or replaced by the manufacturer free of charge. The guarantor shall not be liable for any loss from use of the 
product or incidental or consequential damages including damages to other parts of any installation of which this product is part.
    The guarantee shall not apply to any equipment which is found to have been improperly installed, set up or used in any way not in 
accordance with the instructions supplied with this equipment, or to have been modified, repaired or altered in any way without the express 
written consent of the company. This guarantee shall not apply to any batteries used in the equipment covered under  this guarantee or to 
any damage which may be caused by such batteries. If the tap timer develops a fault, the product must be returned in adequate packing 
with a copy of your original invoice & description of any fault.

1.

 Slide the locking nut over the tap outlet.

2.

 Screw the tap connector to the tap firmly 

     by hand to ensure NO Leaks.

3.

 Place the tap timer onto the connector.

4.

 Screw the locking nut to the tap timer.

    (Arrow indicates a left hand thread)

PROGRAMMING & OPERATING INSTRUCTIONS

             

Note: Flat batteries will be shown by :

 

GUARANTEE

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